2 # Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
4 # This program is free software; you can redistribute it and/or modify
5 # it under the terms of the GNU General Public License version 2 as
6 # published by the Free Software Foundation.
11 ifeq ($(CROSS_COMPILE),)
12 ifndef CONFIG_CPU_BIG_ENDIAN
13 CROSS_COMPILE := arc-linux-
15 CROSS_COMPILE := arceb-linux-
19 KBUILD_DEFCONFIG := nsim_700_defconfig
21 cflags-y += -fno-common -pipe -fno-builtin -D__linux__
22 cflags-$(CONFIG_ISA_ARCOMPACT) += -mA7
23 cflags-$(CONFIG_ISA_ARCV2) += -mcpu=archs
25 is_700 = $(shell $(CC) -dM -E - < /dev/null | grep -q "ARC700" && echo 1 || echo 0)
27 ifdef CONFIG_ISA_ARCOMPACT
29 $(error Toolchain not configured for ARCompact builds)
33 ifdef CONFIG_ISA_ARCV2
35 $(error Toolchain not configured for ARCv2 builds)
39 ifdef CONFIG_ARC_CURR_IN_REG
40 # For a global register defintion, make sure it gets passed to every file
41 # We had a customer reported bug where some code built in kernel was NOT using
42 # any kernel headers, and missing the r25 global register
43 # Can't do unconditionally because of recursive include issues
44 # due to <linux/thread_info.h>
45 LINUXINCLUDE += -include ${src}/arch/arc/include/asm/current.h
48 upto_gcc44 := $(call cc-ifversion, -le, 0404, y)
49 atleast_gcc44 := $(call cc-ifversion, -ge, 0404, y)
51 cflags-$(atleast_gcc44) += -fsection-anchors
53 cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock
54 cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape
56 ifdef CONFIG_ISA_ARCV2
58 ifndef CONFIG_ARC_HAS_LL64
62 ifndef CONFIG_ARC_HAS_DIV_REM
63 cflags-y += -mno-div-rem
68 cfi := $(call as-instr,.cfi_startproc\n.cfi_endproc,-DARC_DW2_UNWIND_AS_CFI)
69 cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables $(cfi)
71 ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
72 # Generic build system uses -O2, we want -O3
73 # Note: No need to add to cflags-y as that happens anyways
77 # small data is default for elf32 tool-chain. If not usable, disable it
78 # This also allows repurposing GP as scratch reg to gcc reg allocator
79 disable_small_data := y
80 cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp
82 cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian
83 ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
85 # STAR 9000518362: (fixed with binutils shipping with gcc 4.8)
86 # arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept
87 # --build-id w/o "-marclinux". Default arc-elf32-ld is OK
88 ldflags-$(upto_gcc44) += -marclinux
90 LIBGCC := $(shell $(CC) $(cflags-y) --print-libgcc-file-name)
92 # Modules with short calls might break for calls into builtin-kernel
93 KBUILD_CFLAGS_MODULE += -mlong-calls -mno-millicode
95 # Finally dump eveything into kernel build system
96 KBUILD_CFLAGS += $(cflags-y)
97 KBUILD_AFLAGS += $(KBUILD_CFLAGS)
98 LDFLAGS += $(ldflags-y)
100 head-y := arch/arc/kernel/head.o
102 # See arch/arc/Kbuild for content of core part of the kernel
105 # w/o this dtb won't embed into kernel binary
106 core-y += arch/arc/boot/dts/
108 core-$(CONFIG_ARC_PLAT_SIM) += arch/arc/plat-sim/
109 core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/
110 core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/
111 core-$(CONFIG_ARC_PLAT_EZNPS) += arch/arc/plat-eznps/
113 ifdef CONFIG_ARC_PLAT_EZNPS
114 KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include
117 drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/
119 libs-y += arch/arc/lib/ $(LIBGCC)
121 boot := arch/arc/boot
123 #default target for make without any arguments.
124 KBUILD_IMAGE := bootpImage
129 boot_targets += uImage uImage.bin uImage.gz
131 $(boot_targets): vmlinux
132 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
134 %.dtb %.dtb.S %.dtb.o: scripts
135 $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
138 $(Q)$(MAKE) $(build)=$(boot)/dts
141 $(Q)$(MAKE) $(clean)=$(boot)
143 # Hacks to enable final link due to absence of link-time branch relexation
144 # and gcc choosing optimal(shorter) branches at -O3
146 # vineetg Feb 2010: -mlong-calls switched off for overall kernel build
147 # However lib/decompress_inflate.o (.init.text) calls
148 # zlib_inflate_workspacesize (.text) causing relocation errors.
149 # Thus forcing all exten calls in this file to be long calls
150 export CFLAGS_decompress_inflate.o = -mmedium-calls
151 export CFLAGS_initramfs.o = -mmedium-calls
153 export CFLAGS_core.o = -mmedium-calls